JPS6371598A - Fan - Google Patents

Abstract

PURPOSE:To obtain a fan having high wind sending efficiency, by scanning a sensor within predetermined angle by means of a sensor scanning mechanism thereby detecting the direction and the distance to an object while simultaneously controlling a wind direction control section and a wind sending motor based on a signal detected through the sensor. CONSTITUTION:A distance measuring section 19 is contained in a support 6 of a fan while a sensor 20 is arranged in the center of a blade guide 18. The sensor 20 comprises an infrared ray emitting element 21, a light emitting focus lens 22, a position detecting element 24 and a light receiving focus lens 25, and a distance measuring section 19 detects the direction and the distance to an object 23 based on the detected signals. The distance control section 19 controls the rotation of a wind sending motor 2 and a swing motor 3 based on said detection results so as to control a fan such that the direction of the object or a person coincides with the center of the wind direction and proper air flow can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric fan that efficiently blows air depending on the direction and distance of a person.

2. Description of the Related Art Conventionally, this type of electric fan has a configuration as shown in FIG. 3, which uses a remote control function. In FIG. 3, the electric fan generates wind using blades 1 and a blower motor 2 that drives the blades 1. The blower motor 2 is a motor whose rotation speed can be changed. The direction of the generated wind can be changed by the oscillating motor 3 and the crank mechanism 4 attached to the oscillating motor 3, so the oscillating motor 3 and the crank mechanism 4 mainly form the wind direction control mechanism 6. ing.

The blade 1, the blower motor 2, and the wind direction control mechanism 6 are connected to a support 6.
Supported by The transmitter 7 for commanding the start/stop of the swing motor 3 and the rotation speed of the blower motor 2 sends a command signal to the receiver 8 to start and stop the swing motor 3 and to change the rotation speed of the blower motor 2. Make the action take place. In the fan configured as described above, when the blades 1 are oriented in the desired direction, the transmitter 7 instructs the receiver 8 to stop the oscillating motor 3, and then the fan motor 2 is redirected to the desired direction.
We are trying to efficiently blow air in the direction of people by sending a command to set the rotation speed of the robot.

FIG. 4 is an electrical system diagram of the electric fan shown in FIG. 3. In FIG. 4, the transmitter 7 is configured such that a signal generated by a carrier wave generation circuit 9 and a signal generated by a transmission code generation circuit 10 are modulated by a modulation circuit 11 and applied to an infrared light emitting element 12. - In the power receiver 8, the signal captured by the infrared light receiving element 13 is amplified by the amplifier circuit 14, the carrier frequency is selected by the filter circuit 16, the transmission code is extracted by the detection circuit 16, and the signal is detected by the signal discrimination circuit 17. The system is configured to determine the validity of When the signal discrimination circuit 17 recognizes that a valid signal has arrived that commands the start/stop of the swing motor 3 or the rotation speed change of the blower motor 2, it turns on/off the swing motor 3 or turns the blower motor 2 on or off. Perform rotation speed switching operation.

Problems to be Solved by the Invention With such a conventional configuration, when trying to efficiently blow air from a fan to a place where people are present, not only the transmitter 7 is required, but also the direction of the wind needs to be set in a desired direction. It is necessary to instruct the oscillating motor 3 to stop after observing when the blower is facing in the direction of , and then to instruct the desired rotation speed of the blower motor 2, which poses problems such as cumbersome operability.

The present invention is intended to solve these problems, and aims to provide a highly effective fan that automatically changes the direction and strength of the wind depending on the location of the person without the need for a transmitter. It is something to do.

Means to Solve the Problem 6 I"- In order to solve this problem, the present invention provides a blade, a blower motor that can drive the blade and change its rotational speed, and a blower motor that can drive the blade and change the rotation speed of the blade. a wind direction control mechanism for changing the direction of the fan; a support that supports the blades, the blower motor, and the wind direction control mechanism; and a distance measuring unit that measures the distance from the fan to an object within a wind direction change angle; The distance measurement unit has a sensor that transmits and receives infrared rays or ultrasonic waves, and a sensor scanning mechanism that scans this sensor within the wind direction change angle, and determines the direction of the person from the change in distance value obtained within the wind direction change angle. The wind direction control mechanism is controlled so that the detected direction becomes the center of the wind direction, and the rotation speed of the fan motor is changed depending on the distance between the person and the fan.

With this configuration, if the sensor scanning mechanism scans the sensor within a certain angle and detects and stores the distance value of an object within this angle, it can be determined that there is a person in the direction where this distance changes. The wind is 6 be in that direction.

After controlling the wind direction control unit so that it is at the center of the direction, the rotation speed of the fan motor is changed depending on the distance value in that direction. can be provided.

Embodiment The basic configuration of an electric fan according to an embodiment of the present invention is the same as that of the conventional electric fan shown in FIG. 3, except that it is equipped with a distance measuring section and a senna scanning mechanism. Detailed explanation will be omitted. The sensor scanning mechanism according to this embodiment shares the swing motor 3 and the wind direction control mechanism 6 using the crank mechanism 4 in FIG. 3, and the sensor is installed at the center 18 of the blade guard. Further, the distance measuring section excluding the sensor is housed in a part of the support body 6.

FIG. 1 is an electrical system diagram of the electric fan according to this embodiment. In FIG. 1, distance measuring section 19 includes a sensor 20. In FIG. This sensor 2o includes an infrared light emitting element 21 and an emission convergence 7 for converging the infrared light emitted from the infrared light emitting element 21 into a beam shape. It is composed of a position detection element 24 for detecting , and a light receiving converging lens 25 for converging reflected infrared rays onto this position detection element 24 . The distance from the emission converging lens 22 to the object 23 is obtained based on the well-known principle of triangulation, and although the details are omitted, it can be obtained using the current value flowing in both directions from the position detection element 24. Can be done. The infrared rays to be projected are obtained by modulating a signal generated by a carrier wave generation circuit 26 and a signal generated by a synchronization signal generation circuit 27 using a modulation circuit 28 and applying the modulated signals to the infrared light emitting element. On the other hand, the reflected infrared rays converted into a current by the position detection element 24 are converted into a voltage value by a current-voltage conversion circuit 29, and are inputted to a distance calculation circuit 31 via an amplifier circuit 30.

The operation of the distance calculation circuit 31 will be explained in more detail with reference to FIG. The sensor 20 scanned within a certain angle by the sensor scanning mechanism, that is, the wind direction control mechanism 6, projects infrared rays for each minute angle unit, so the distance calculation circuit 31 calculates the distance between the object 23 and the electric fan each time. gradually memorize it. For example, as shown by the solid line in FIG.
If a person moves from a distance within the range of the fan's wind within the infrared projection angle (within the two-dot chain line in Figure 2), the distance changes greatly depending on the direction of the projection angle, so there is a person in that direction. I understand that. Thereafter, the distance calculation circuit 31 controls the swing motor 3 to operate so that the direction in which the person is located becomes the center of the wind direction. At this time, the distance calculation circuit 31 changes the rotation speed of the fan motor 2 depending on the distance between the person and the fan. In the case where nine people are located at the location indicated by the solid line in Figure 2 and when they are located at the location indicated by the broken line, the blower motor 2 is used in the former case.
Increase the rotation speed. Furthermore, when there is no one present, the swing motor 3 is controlled so that the sensor 20 within a certain angle scans again.

In order to realize the above operation, the oscillating motor 3 needs to be capable of forward and reverse rotation and control the rotation angle.

Incidentally, in this embodiment, the wind direction control mechanism 5 consisting of the swing motor 3 and the crank mechanism 4 is shared with the sensor scanning mechanism 9. However, a mechanism capable of scanning only the sensor 20 within a certain angle may be provided exclusively. No difference in effectiveness. In this case, a configuration in which a wind direction control plate is installed in front of the blade 1 as the wind direction control mechanism 6 so that the center of the wind direction is directed toward the direction where the person is present is also effective.

Effects of the Invention As is clear from the description of the embodiments above, by being equipped with a function that can measure the distance between an object and the fan within the wind direction change angle, it is possible to measure the distance between an object and the fan without using a transmitter. Efficient ventilation can be performed automatically.

[Brief explanation of the drawing]

FIG. 1 is an electrical system diagram of a fan according to an embodiment of the present invention;
FIG. 2 is an explanatory diagram of the same operation, FIG. 3 is a configuration diagram of the conventional electric fan, and FIG. 4 is an electrical system diagram of the same. Name of agent: Patent attorney Toshio Nakao and 1 other person
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Claims (4)

[Claims] (1) A blade, a blower motor that can drive the blade and change its rotation speed, a wind direction control mechanism that changes the direction of the wind generated by the blade, the blade, the blower motor, and a wind direction control mechanism. and a distance measuring section that measures the distance from the fan to an object within the wind direction changing angle, and the distance measuring section includes a sensor that transmits and receives infrared rays or ultrasonic waves, and a distance measuring section that measures the distance of an object within the wind direction changing angle. It has a sensor scanning mechanism that scans at An electric fan configured to vary the rotational speed of the blower motor depending on the distance between the fan and the fan. (2) The electric fan according to claim (1), wherein the wind direction control mechanism uses an oscillating motor that can change the direction of the blades and the blower motor. (3) The electric fan according to claim (1), wherein the wind direction control mechanism uses a wind direction control plate installed in front of the blades. (4) The electric fan according to claim (1), wherein the sensor scanning mechanism is used in common with a wind direction control mechanism that uses a swing motor to change the direction of the blades and the blower motor.